New boiler needed: combi vs standard?

roses

Hello!

I am getting a loft conversion done and need a new boiler as the existing one is barely enough to cover the existing house.

I seem to be finding a lot of people who are against combi boilers (what my existing is) and I honestly don't know why.

My house will have three bathrooms once the loft is converted. It is unlikely that there will be more than two showers used simultaneously.

I understand that the difference in flow rates is 15 litres/min for a combi and 55 litres/min for a standard boiler with hot water tank.

My issue with a standard boiler is the following:

1) I do not want the hot water to run out half way through the shower as has happened in EVERY SINGLE house I have ever lived in.
2) Lack of space! I have a long narrow terraced so where would the hot water tank go once I get the loft converted? Loft space and hallway space will be very restricted.

Does anyone have any advice?

What boiler would you get if you have a three storey house with two main bathrooms?

andrew-b

A standard condensing boiler plus cylinder isn't going to work as it relies on being gravity fed from a cold water tank above so loft conversion hot water pressure won't be very good if cylinder and water tank are in loft. I don't see you have much choice other than a combi really. You can have a pressurised cylinder plus standard boiler but where would you put the tank. If a combi isn't going to be upto supplying more than one shower at once could you not consider an electric shower in the loft?

Andy

Canucklehead

Good afternoon: The solution is dependent on the mains pressure/flow rate at your property. Your CORGI should be able to give you appropriate advice after a site assessment.

HTH

Canucklehead

Andy_Hamilton

I have a condensing boiler with a pressurised tank in a cupboard, It sound dead old fashioned but it's only an 8 months old house.
On one heat, there is enough water for the dishes at night a bath and 2 showers in the morning. If I turn the water off on a friday, on sunday it's still hot enough to hurt.
I'm a fan of this system but we had roughly the same system 15 years ago and it was rubbish.
Really cheap to run.